Pipe tongs



Patented Feb. 16, 1926 UNITED STATES "PATENT OFFICE.

HARRY C. BREWSTER, OF SHREVE] P011311,- LOlJ'ISIANA.

PIPE TQNGS.

. Application filed June 28, 1,922, Sbrial No. 571,350. Renewed Qctober 3, 1925.

To all who-m it may concern:

Be it known that I, H'ARRY'C. BREWSTER, a 'tizen of the United States, and resident of hreveport, in the parish of Caddo and State of Louisiana, have invented 'certain new and useful Improvements in Ripe Tongs, of which the following is a specification.

This invention relates to. tongs especially adapted for gripping the pipes and Conplings employed. in an oil well and the in- 'ries having novel means whereby the several -'a .part.of this ap lication, in which {ike wrenches may be rotated in either direction. A further object is to provide a pipe wrench for oil wells which is of highly simplified 'c onstruction, safe to' use and cheap to manufacture. v

Other objects and advantages of the invention will be-apparent during the course of the followingldescriptio'n.

- In the accompanying drawings, forming numerals are emp oyed to designate ike parts throughout t e same,

Figure'1 1s a'perspective illustrating the improved double wrench a plied.

Figure '2 is a. vertica sectional view through the wrench applied.

Figure 3'is a perspective ofthe wrench.

Fi ure 4 is a rs ective of the u er" g radial lugs 18 which are adapted to be ar 1,00

wrench, the jaws being separated or their-open positions, I

Figure 5 is a perspectiveof one of the p j s,

Figure '6 is a perspective of a handle embodied in theinvention,

I Figure 7. a, perspectiveof one of the jaws forming a part of theto wrench the .same beingassociate'd with t eja'w finstrated' in Figu one an... jaws of thebottom provide a pipe bottom.

embodied in the bottom wrench,

Figure 10 is a perspective of one of 1c Figure Q-is a perspective of the hang? jaws of the bottom Wrench, the same being associated with the jaw illustrated in Figure 8.

, In the drawing the numerals 5 and 6 generally designate upper. and lower wrenches respectively while the numerals 7 designates pipe sections'joined by meansjofa couphng 8. r

The invention forming the subject matter of this application resides in the 'pro-.

vision of means whereby the wrenches may be applied to the column formed by the sections 7 entirely by one man and subsequently operated independently of each other so thatf-the upper section 7 may be rotated.- i I The upper wrench consists of a'pair'cfsemi-circular jaws 10 adapted to" be ar-' ranged about the upper section 7 and having their rear ends formed with radial shanks 11 connected tothe cars 12 of the handle 13 through. the medium of pivot .pins.

14;. With reference to Figure 5 itwill-be bbserved that the radial shanks 11- are vprovided with diagonal slots .16 which receive the pivot pins 14. By reason of'thisconstruction, when the handle 13 is rotated in one direction one of the jaws 10 will be urged into grip pipe and when t other direction, the other jaw will be urged into gripping engagement with thepipe. It is thus seen that the direction-of travel of the wrench may be quickly reversed within% engagement with the e a Figures 4, 5 and/7 illustrate that the air-- ward ends of the jaws 10 are provided with ranged in' parallel relation, as illustrated in ndle is rotated in the.

- out any adjustment or change in the ar- Figure 1 and subsequently connected. by f means of a latch 20 pivotedto onefljof the ln The free end. ofjthe latch 20 is provied with an'upstanding end portion 21 which may be engaged'with the oiiteredge of one of the lugs 18 in the manner-illustrated in Figure 1.. This securely and positive'ly 'holds the jaw 10 in the position illustrated inlFlg'ure I 1 Th lower wrench 61s more or similar in cons truction to the upper wrench and consists *of .a pair of jaws 22 having their inner sides provided .with gripping means 45.. The rear ends of thejaws 22 are provided with'radial shanks 24 having dlagonal slots 25 .for the reception of pivot plns 26 carried by the ears 27 of the lower handle 28. In this case also the diagonal slots 25 and the pins 26 provide a means whereby '35 adapted to"' engage the free lug.-

The upper wrench and more particularly the jaws 10 of the same are provided with depending flanges 40 having their innersides formed with grooves 41 to receive outwardly rojecting fia'nges 44 of the lower jaws 22. it will be observed. that. the semi-circular flanges H-of which" there aretwo are rota'tably received in the grooves 41 so that the upper wrench will 'rotatably support the lower wrench. 7 That is to say the two wrenches are rotatably connected and'one of tre wrenches may remain stationary while the other wrench may be rotated.

When the top wrench 5' which carries the bottom wrench is open as illustrated in Figure 4 the lower wrench may be detached and used separately if desired.

In use the upper andlower'wrenches are rotatably. connected and are applied to the ipe as a unit entirely by one person, therey dispensing with the necessity of employing two attendants as is now the case. The handle 28 of the lower wrench is now engaged with the more orless stationary post of the drilling rotary and the upper wrench and more particularly the handle of the same is rotated .about .the axis of the post for tightening or loosening the upper pipe section 7. It-is thus seen that when applied one of the wrenches may be'rotated without I interference by the other wrench 'and when it is desired to detach the wrench it is merely necessa'ry'to swingthe latches; 20 and 34 outwardly to the-positions illustrated in Figures 3 nd-7. With reference to'the foregoing descrip-v tion taken in connection with the accomanyingfdrawings, it will be apparent that iheimproved wrench may-'be economically operatedasthenun berpf attendants neoes- I I wigeeds Lava-deem -ing ears provided with pivot pins. received other.

provided. with Having thus described the invention, what is claimed is 5-- 1. A wrench. of comprising upper; and lower wrenches, each of which is provided with semi-circular jaws having their rear ends formed with-shanks provided with diagonal slots,'handles havin said slots, one .of the wrenches beingpro- .vided with semi-circular flanges having grooves, and the other wrench being provided' with semi {circular flanges received in said grooves whereby to connect the Wrenches for rotation'with relation to each 2. A wrench of the character described comprising upper and lower wrenches, each of which isrovided with. semi-circular jaws having t eirrear ends formedwith radial shanks provided with diagonal slots,

the character described handles having'ears provided with plvot' pins received in said .slots, one of the wrenches being provided with semi-circular flanges having grooves, and the other wrench being provided with 'semi-circular flanges receivedin said grooves whereby to" connect the wrenches for tation. with relation to each other, and radi lugs formed on said jaws and having means whereby the same may be detachably' connected.

3. A device of the class described comprising upper and lower wrenches each of whic is provided with semi-circular jaws having "gripping means, the rear ends 0? he jaws being provided "with radial shanks, handles connected'to said shanks, the forward ends of said jaws being provided with lugs, latches pivoted to certain of sai d lugs and engaging theother lugs whereby .to hold the jaws together, the upper wrench being send-circular depending flanges surrounding the lower. jaws and having grooves on their inner sides, and the. jaws of the slower wrench being provided with outwardly "projecting semi-circular flanges received in said g'rooveswhereby to detachably connect the lower wrench to the upper wrench.

4. A pipe wrench comprising a-plurality of pipegripping units, rotatably fitted within each'ot er lockingmeans atone fend of each unit and combined'presaure and re:

' HARR o. BREWSTER-J" I tating means at the opposite end of each innit 

